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From: ajs@hpfcla.UUCP
Newsgroups: net.auto.tech
Subject: Re: What causes Datsun clutch chatter?
Message-ID: <72800005@hpfcla.UUCP>
Date: Thu, 21-Nov-85 12:27:00 EST
Article-I.D.: hpfcla.72800005
Posted: Thu Nov 21 12:27:00 1985
Date-Received: Wed, 11-Dec-85 07:55:34 EST
References: <72800002@hpfcla.UUCP>
Organization: 21 Nov 85 10:27:00 MST
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> Here's a summary of responses to my question:

>> What can cause clutch chatter in a front wheel drive Datsun?

I "showed" the noise to a Datsun######Nissan mechanic.  Surprise!  He
thinks it's just a harmonic vibration in the car frame somewhere, and
suggested I go underneath looking for a loose hunk of metal.  He said if
it were bearings, the noise would appear independently of the RPM.

Well, you can't hear it at all outside the vehicle, and it's tough with
the door open.  Yes, it does act like a harmonic vibration -- it has a
peak at 2500 RPM -- though it falls off much more slowly on the high
side.  It sure sounds like it's coming from the clutch, but since it's
only noticeable inside, I guess I'll have to poke around down there
(maybe with a microphone connected to an amp?) to find the source.
(This I will do as soon as the temperature climbs back to where cold
metal doesn't remove your epidermis...)

Alan Silverstein, Hewlett-Packard Fort Collins Systems Division, Colorado
{ihnp4 | hplabs}!hpfcla!ajs, 303-226-3800 x3053, N 40 31'31" W 105 00'43"